Abstract

The present study is focused on the development and characterization of innovative cementitious-based composite sensors. In particular, multifunctional cement mortars with enhanced piezoresistive properties are realized by exploiting the concept of confinement of Multiwall Carbon Nanotubes (MWCNTs) and reduced Graphene Oxide (rGO) in a three-dimensional percolated network through the use of a natural-rubber latex aqueous dispersion. The manufactured cement-based composites were characterized by means of Inelastic Neutron Scattering to assess the hydration reactions and the interactions between natural rubber and the hydrated-cement phases and by Scanning Electron Microscopy and X-Ray diffraction to evaluate the morphological and mineralogical structure, respectively. Piezo-resistive properties to assess electro-mechanical behavior in strain condition are also measured. The results show that the presence of natural rubber latex allows to obtain a three-dimensional rGO/MWCNTs segregate structure which catalyzes the formation of hydrated phases of the cement and increases the piezo-resistive sensitivity of mortar composites, representing a reliable approach in developing innovative mortar-based piezoresistive strain sensors.

Details

Title
MWCNT/rGO/natural rubber latex dispersions for innovative, piezo-resistive and cement-based composite sensors
Author
Verdolotti, L 1 ; Santillo, C 2 ; Rollo, G 2 ; Romanelli, G 3 ; Lavorgna, M 1 ; Liguori, B 4 ; Lama, G C 2 ; Preziosi, E 5 ; Senesi, R 5 ; Andreani, C 5 ; di Prisco M 6 

 National Research Council, , Institute of Polymers, Composite and Biomaterials, Portici, Naples, Italy (GRID:grid.5326.2) (ISNI:0000 0001 1940 4177); National Research Council, Institute of Polymers, Composite and Biomaterials, Lecco, Milan, Italy (GRID:grid.5326.2) (ISNI:0000 0001 1940 4177) 
 National Research Council, , Institute of Polymers, Composite and Biomaterials, Portici, Naples, Italy (GRID:grid.5326.2) (ISNI:0000 0001 1940 4177) 
 ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, UK (GRID:grid.14467.30) 
 National Research Council, , Institute of Polymers, Composite and Biomaterials, Portici, Naples, Italy (GRID:grid.5326.2) (ISNI:0000 0001 1940 4177); University of Naples Federico II, Department of Chemical, Materials and Production Engineering, Naples, Italy (GRID:grid.4691.a) (ISNI:0000 0001 0790 385X) 
 Università degli Studi di Roma “Tor Vergata”, Dipartimento di Fisica and NAST Centre, Rome, Italy (GRID:grid.6530.0) (ISNI:0000 0001 2300 0941) 
 Politecnico di Milano, Department of Civil and Environmental Engineering, Milan, Italy (GRID:grid.4643.5) (ISNI:0000 0004 1937 0327) 
Publication year
2021
Publication date
2021
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2575651655
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.